1/18/2021 Memorandum on Space Policy Directive 7 | The White House (d) “Alternative PNT Service” refers to a PNT service that has the capability to operate completely independent of, or in conjunction with, other PNT services. Multiple, varied PNT services used in combination may provide enhanced security, resilience, assurance, accuracy, availability, and integrity. An alternative PNT service allows a user to transition from the primary source of PNT signals in the event of a disruption or manipulation. (e) “Interoperable” refers to the ability of multiple, independent PNT services and their augmentations to be used together to provide better capabilities at the user level than would be achieved by relying solely on a single service or signal. (f) “Compatible” refers to the ability of multiple, independent PNT services and their augmentations to be used separately or in combination with each other without interfering with any individual service, and without adversely a ecting the United States and allied military employment of PNT, commonly referred to as Navigation Warfare. (g) “Navigation Warfare” or “NAVWAR” refers to the deliberate defensive and o ensive action to assure and prevent positioning, navigation, and timing information through coordinated employment of space, cyberspace, and electronic warfare. Desired e ects are generated through the coordinated employment of components within information operations, space operations, and cyberspace operations, including electronic warfare, o ensive and defensive space operations, and computer network operations. Sec. 3. Background. The multi-use services provided by GPS are integral to United States national security, economic growth, transportation safety, and homeland security. These services are essential but largely invisible elements of worldwide economic infrastructures. (a) Responsible use of Space–Based PNT. https://www.whitehouse.gov/presidential-actions/memorandum-space-policy-directive-7/ 4/24